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Old 10-18-2019, 09:46 AM   #726
JohnLane
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Tom no 12 volts at the Lambda ECU is easy! You are almost there.
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Old 10-20-2019, 10:54 AM   #727
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A rainy and cold Saturday and I could have been sitting in a lawn chair on a golf course in South Carolina where it was raining harder.

Took a big nap and researched Frequency Valve operation.

The module pinout:

#2 and #4 O2 sensor input
#5 ground
#7 operating ground from thermal switch or micro switch
#8 12v power from System Relay
#15 ground to Frequency Valve for operation
#16 ground




The System Relay

#15 ground to Frequency Valve
#30 permanent 12v power
#85 ground
#86 12v power from fuel pump relay
#87 12v power to pin #8 of Module
#87a power to Frequency Valve



The schematic in the '81 Green Book does not have wire color codes. System relay pin 30 appears to be red in a large gauge, Pin 87 again is red and a large gauge. Pin 86 is blue/green, and pin 87a is green.

I believe I opened this relay and cleaned the contacts about 7 years ago. Probably should replace it. Bosch 0332015006 / Volvo 1324749.

Doesn't come up in IPD, Tasco or FCP in a search.

Anyone got one, preferable new?
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Last edited by TestPoint; 10-23-2019 at 03:41 PM..
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Old 10-23-2019, 03:42 PM   #728
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Nelson,

The System Relay is the middle one but since they clip onto the power buss bar they could get swapped.
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Old 10-23-2019, 09:13 PM   #729
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Tom - can you temporarily jumper it to confirm it's the problem before seeking a replacement?
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Old 10-27-2019, 03:09 PM   #730
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Replaced the plugs and O2 sensor today while awaiting the very rare OEM Bosch metal case System Relay. Never mind the picture on ebay, if you order a 006 relay at the moment it is going to come in a blue plastic housing.



Really strange that #6 cylinder was far more sooted up than others and #4 appeared that it had never been fired. Injectors were new Bosch 4 years and about a gallon of gas ago. Fuel Distributor has been commercially rebuilt and I assume calibrated. I used 'commercially' rebuilt rather than 'professionally' rebuilt since JayTan is no longer in business.

Last edited by TestPoint; 10-27-2019 at 05:45 PM..
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Old 10-28-2019, 07:35 PM   #731
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Would anyone like to comment on the difference between the #4 and #6 plugs? Number 4 appears never to have been fired. Number 6 looks like it is running very rich.




This car has only been driven perhaps a hundred miles since these plugs were changed.

Do I need to get the baby bottles out again?
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Old 10-28-2019, 07:58 PM   #732
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I’d try and get it going again Tom with some consistency and THEN try to assess things like the plugs. Not driving it regularly is, of course, tough in one. And lots of things can cause a plug to look like that - a bit of coolant in that cylinder could do that as well. You gotta get it going.

You see my question above?
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Old 10-28-2019, 08:24 PM   #733
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My very rare OEM metal case 006 relay is due in maybe tomorrow. Sorta put the Bertone in second place. I have about a hundred little short Boy/Girl Scout people showing up in 2 weeks and I have a restroom to complete.

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Old 10-28-2019, 10:09 PM   #734
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I appreciate your commitment to the Scouts.... having done around 8 years with Webelos/Scouts as a leader, they need care and support from adults such as yourself. Kudos!

For sure, that single plug wasn't firing, and/or was washed out by a coolant leak as Michael opined. Did you ever put a clamp on timing light on each wire/plug combo? Did this V6 ever run long enough to determine if it consumed coolant? My few experiences with coolant leaks (HG's) showed a white insulator of the plugs.... should be plenty o' online pics showing the color of the insulators and assigned cause. We're pulling for you Tom!
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